Adopt let else in more places

1 files changed, 4 insertions, 6 deletions

diff --git a/compiler/rustc_builtin_macros/src/env.rs b/compiler/rustc_builtin_macros/src/env.rs
index 285027fc632..66ee93ce3c9 100644
--- a/compiler/rustc_builtin_macros/src/env.rs
+++ b/compiler/rustc_builtin_macros/src/env.rs
@@ -16,9 +16,8 @@ pub fn expand_option_env<'cx>(
     sp: Span,
     tts: TokenStream,
 ) -> Box<dyn base::MacResult + 'cx> {
-    let var = match get_single_str_from_tts(cx, sp, tts, "option_env!") {
-        None => return DummyResult::any(sp),
-        Some(v) => v,
+    let Some(var) = get_single_str_from_tts(cx, sp, tts, "option_env!") else {
+        return DummyResult::any(sp);
     };
 
     let sp = cx.with_def_site_ctxt(sp);
@@ -62,9 +61,8 @@ pub fn expand_env<'cx>(
         Some(exprs) => exprs.into_iter(),
     };
 
-    let var = match expr_to_string(cx, exprs.next().unwrap(), "expected string literal") {
-        None => return DummyResult::any(sp),
-        Some((v, _style)) => v,
+    let Some((var, _style)) = expr_to_string(cx, exprs.next().unwrap(), "expected string literal") else {
+        return DummyResult::any(sp);
     };
     let msg = match exprs.next() {
         None => Symbol::intern(&format!("environment variable `{}` not defined", var)),